72 FUMIGATION METHODS 
for other purposes in orchards and farm work. In 
some cases the sheets are used to cover fruit in wagons 
as it is hauled to the station. The frames are put to- 
gether with nails or screws, and are easily taken to 
pieces and stored away for future use. This type of 
fumigator is valuable for small trees and shrubs in or- 
chards and on private grounds. ‘The method of oper- 
ating this type of fumigator is shown in Figs. 36 to 
42, taken by the author expressly for this work. 
A box fumigator.—A new style, much after the 
old type of the Emory fumigator, has been designed by 
Prof. V. H. Lowe, of the New York Experiment Sta- 
tion. It is intended for use with the smaller orchard 
trees, such as peach, pear, plum, and quince. A good 
idea of the general construction of this apparatus can 
be gotten from a study of Fig. 43. The dimensions. 
are 10x 6 x 6 feet. The frame consists of well-sea- 
soned pine strips three inches wide and seven-eighths 
inches thick, braced on three sides by double cross- 
pieces of the same thickness and one and one-fourth 
inches wide. ‘The base is made of four-inch strips 
and has but three sides, the fourth being omitted to 
avoid the necessity of lifting the generator from the 
top of the tree before putting it in place. The frame 
is covered with eight-ounce ducking, such as described 
for the Emory tents and other fumigators. The cloth 
was oiled with boiled linseed oil, in which lampblack 
was mixed to give ita dark color. To prevent trees 
from penetrating the top of the fumigator a stout wire 
netting was tacked on the inside of the upper half of 
the frame. 
A strip of canvas one and one-half feet wide was 
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